Heat dissipation device and fin structure

ABSTRACT

This disclosure relates to a fin structure including a main body and at least one minor structure. The main body includes a main plate and two side plates. The main plate has at least one through hole. The two side plates are respectively connected to two opposite sides of the main plate and protrude from the main plate. The at least one minor structure protrudes from the main plate and is located at a side of the main plate. The at least one minor structure is spaced apart from the two side plates. The at least one minor structure partially covers the at least one through hole. The at least one minor structure has a length, in a longitudinal direction of the main plate, less than a length of the at least one through hole of the main plate.

CROSS-REFERENCE TO RELATED APPLICATIONS

This non-provisional application claims priority under 35 U.S.C. §119(a) on Patent Application No(s). 107215438 filed in Taiwan, R.O.C. onNov. 14, 2018, the entire contents of which are hereby incorporated byreference.

TECHNICAL FIELD

The present disclosure relates to a heat dissipation device having fins,more particularly to a heat dissipation device having a more efficientextended surface structure.

BACKGROUND

In a computer system, an integrated circuit (IC) such as a centralprocessing unit, a north bridge chip, a south bridge chip and a graphicschip of a motherboard generally generate a large amount heat. In orderto quickly remove the heat, some users may lean to use a liquid-cooledcooling system instead of an air-cooled cooling system. The conventionalliquid-cooled cooling system may include a water block and a waterradiator connected to each other. The water block is in thermal contactwith the heat source to absorb the heat, and then the heat will bedissipated by the water radiator.

In order to further improve the heat dissipation efficiency, theconventional liquid-cooled cooling system may further contain fins addedto the water block. In detail, the conventional fins are usuallyarranged side by side so as to form flow channels therebetween. In thiscase, there is no feature in the flow channel to interfere with thecoolant so that the coolant has a slower velocity and less turbulence,thereby having a less heat transfer. As a result, the heat exchangeefficiency may be insufficient in the conventional fin structures.

Adding internal fins always increases velocity because they decrease thearea for flow. If a constant volume of fluid has to pass through asmaller channel, velocity must increase. Furthermore, the increasing ofvelocity may cause velocity fluctuation, also known as turbulence, whichhas a larger cross-sectional area for flow. Therefore, internal fins inthe flow channel accelerate the fluid velocity, cause turbulence andincrease the area available for heat transfer, thus increasing the heatexchange efficiency, but adding more fins decreases the distance betweenfins making the heat sink more susceptible to blockage caused byparticles in the coolant. To avoid fluid blockage, some use fewer finsin order to obtain a greater distance between the fins. However, thisalso decreases the total surface area of the fins in the flow channeland decreases fluid velocity, thereby decreasing heat transfer.

For example, an electronic device for controlling a self-driving car isusually populated with a group of cold plates for heat dissipation, andeach cold plate contains internal fins to absorb more heat. However,particles or debris caused by the movable parts of the car may flow intothe circulation to block the narrow gaps between the internal fins.

SUMMARY

The present disclosure provides a heat dissipation device and a finstructure that increases the heat exchange efficiency for a given fingap.

According to one aspect of the present disclosure, a fin structureincludes a main body and at least one minor structure. The main bodyincludes a main plate and two side plates. The two side plates arerespectively connected to two opposite sides of the main plate andprotrude from the main plate. The at least one minor structure protrudesfrom the main plate and is located at a side of the main plate. The atleast one minor structure is spaced apart from the two side plates.

According to another aspect of the present disclosure, a heatdissipation device includes a plurality of fin structures. The pluralityof fin structures each include a main body and at least one minorstructure. Two of the plurality of the fin structures are connected soas to form a channel. The at least one minor structure connected to themain body is located in the channel. The at least one minor structure ofone of the plurality of fin structures is spaced apart from the mainbody of another one of the plurality of fin structures.

According to the heat dissipation device and the fin structure discussedabove, the minor structure protrudes from the main body and does notoverlap with another main body. This configuration can cause the fluidto become a turbulent flow so as to increase the heat exchangeefficiency. Also, in one embodiment, the maximum distance is largeenough to prevent particles or debris in the fluid from blocking thechannel.

Moreover, the minor structures of the fin structures do not interferewith the adjacent main bodies, such that it would be easy and convenientto connect the fin structures and modify the shape of the minorstructure. The fin structures may be assembled by, for example, welding.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure will become more fully understood from thedetailed description given hereinbelow and the accompanying drawingswhich are given by way of illustration only and thus are not intendingto limit the present disclosure and wherein:

FIG. 1 is a perspective view of a heat dissipation device according to afirst embodiment of the present disclosure;

FIG. 2 is a partially perspective view of a fin structure of thedissipation device in FIG. 1;

FIG. 3 is a front view of the fin structure in FIG. 2;

FIG. 4 is a partially cross-sectional top view of the heat dissipationdevice in FIG. 1;

FIG. 5 is a partially enlarged cross-sectional top view of the heatdissipation device in FIG. 4.

FIG. 6 is a front view of a fin structure according to a secondembodiment of the present disclosure;

FIG. 7 is a front view of a fin structure according to a thirdembodiment of the present disclosure;

FIG. 8 is a front view of a fin structure according to a fourthembodiment of the present disclosure;

FIG. 9 is a front view of a fin structure according to a fifthembodiment of the present disclosure;

FIG. 10 is a partially cross-sectional top view of a fin structureaccording to a sixth embodiment of the present disclosure;

FIG. 11 is a front view of a fin structure according to a seventhembodiment of the present disclosure;

FIG. 12 is a partially enlarged perspective view of a heat dissipationdevice according to an eighth embodiment of the present disclosure;

FIG. 13 is a partially enlarged front view of the heat dissipationdevice in FIG. 12;

FIG. 14 is a partially enlarged side view of the heat dissipation devicein FIG. 12;

FIG. 15 is a partially enlarged cross-sectional top view of the heatdissipation device in

FIG. 12;

FIG. 16 is a partially enlarged perspective view of a heat dissipationdevice according to a ninth embodiment of the present disclosure;

FIG. 17 is a partially enlarged side view of the heat dissipation devicein FIG. 16;

FIG. 18 is a partially enlarged front view of the heat dissipationdevice in FIG. 16;

FIG. 19 is a partially enlarged cross-sectional top view of the heatdissipation device in FIG. 16;

FIG. 20 is a partially enlarged perspective view of a heat dissipationdevice according to a tenth embodiment of the present disclosure;

FIG. 21 is a partially enlarged side view of the heat dissipation devicein FIG. 20;

FIG. 22 is a partially enlarged front view of the heat dissipationdevice in FIG. 20; and

FIG. 23 is a partially enlarged cross-sectional top view of the heatdissipation device in FIG. 20.

DETAILED DESCRIPTION

In the following detailed description, for purposes of explanation,numerous specific details are set forth in order to provide a thoroughunderstanding of the disclosed embodiments. It will be apparent,however, that one or more embodiments may be practiced without thesespecific details. In other instances, well-known structures and devicesare schematically shown in order to simplify the drawing.

Please refer to FIG. 1 to FIG. 2, wherein FIG. 1 is a perspective viewof a heat dissipation device according to a first embodiment of thepresent disclosure, and FIG. 2 is a partially perspective view of a finstructure of the dissipation device in FIG. 1.

This embodiment provides a heat dissipation device 10 disposed in, forexample, a water block (not shown in figures). The heat dissipationdevice 10 includes a plurality of fin structures 100. These finstructures 100 can be connected to one another so as to form a channel Stherebetween for fluid (not shown in figures) flowing through the finstructure 100 along a flow direction F. Each of the fin structures 100includes a main body 110 and at least one minor structure 120. The minorstructure 120 is disposed on the main body 110, is located in thechannel S, and is spaced apart from each other. Further, in the heatdissipation device 10, the minor structures 120 of one of the finstructures 100 are spaced apart from the main body 110 of the adjacentfin structure 100.

These fin structures 100 basically have the same design; thus only oneof them will be described in detail below. In this embodiment, the mainbody 110 of the fin structure 100 may further include a main plate 111and two side plates 112. The main plate 111 has a first surface 111 aand a second surface 111 b opposite to each other. The two side plates112 are respectively connected to two opposite sides of the main plate111 and protrude from the first surface 111 a of the main plate 111.Moreover, the main plate 111 has a plurality of through holes P and aplurality of first edges 1111. The first edges 1111 are located at twoopposite sides of the through hole P and are not directly connected tothe minor structure 120, and the first edge 1111 is substantiallyorthogonal to a longitudinal edge L of the main plate 111, but thedisclosure is not limited thereto. In some other embodiments, the firstedge may be at an acute angle with respect to the longitudinal edge L.

Each of the minor structures 120 protrudes from the first surface 111 aof the main plate 111 and may be made by, for example, a stampingprocess. The minor structures 120 each include a diversion part 121 andtwo connecting parts 122. The diversion part 121 has a rectangular shapeand is substantially parallel to the main plate 111. Two opposite sidesof the diversion part 121 are respectively connected to the main plate111 via the two connecting parts 122, and each of the other two oppositesides of the diversion part 121 and the main plate 111 have an opening Otherebetween. Specifically, the diversion part 121 has two second edges1211 that are respectively located at two opposite sides of thediversion part 121 and are not directly connected to the main plate 111.Also, the second edges 1211 are substantially orthogonal to thelongitudinal edge L of the main plate 111, but the disclosure is notlimited thereto. In some other embodiments, the second edges may be atan acute angle with respect to the longitudinal edge L. The opening O issurrounded by the second edges 1211 of the diversion part 121 and thefirst edges 1111.

Please refer to FIG. 3, which is a front view of the fin structure inFIG. 2. A side length H1 of the main plate 111 is larger than a sidelength H2 of the diversion part 121 in a direction F1, and the minorstructure 120 is spaced apart from the two side plates 112.Specifically, in this embodiment, the side length H1 of the main plate111 minus six times of the thickness T of the side plate 112substantially equals to the side length H2 of the diversion part 121,but the disclosure is not limited thereto.

In this embodiment, each of the diversion parts 121 is spaced apart by adistance d1 from either one of the side plates 112. In addition, thediversion parts 121 have the same side length W in a direction F2, andthe direction F2 is perpendicular to the direction F1. Further, thediversion parts 121 of each fin structure 100 have the same interval G;that is, on each fin structure 100, every two adjacent the diversionparts 121 are spaced apart by the same distance. As shown in the figure,the interval G is measured in the direction F2, and all of the intervalsG have the same value.

Please refer to FIG. 4, which is a partially cross-sectional top view ofthe fin structures 100 connected to one another, that is across-sectional top view of the heat dissipation device in FIG. 1. Amongthese fin structures 100, the minor structures 120 do not overlap withthe main plates 111. And all of the minor structures 120 protrude fromthe first surface 111 a of the main plate 111 by the same distance d2.As indicated by the arrows, while the fluid flows along the channels S,the fluid will be repeatedly divided into two and thus becoming aturbulent flow. This configuration forces the fluid to flow toward thefirst surface 111 a, second surface 111 b of the main plate 111 and sidesurfaces of the diversion part 121, thereby increasing the heat exchangeefficiency of the heat dissipation device 10.

In addition, the openings o do not extend to the side plates 112.Therefore, the fin structure 100 has a decent structural strength whilehaving the configuration to achieve the above turbulent flow.

Moreover, the minor structures 120 of the fin structures 100 do notinterfere with the adjacent main bodies 110, such that it would be easyand convenient to connect the fin structures 100 and possible to modifythe shape of the minor structure 120. In this or other embodiments, thefin structures 100 are assembled by, for example, welding, but thedisclosure is not limited thereto.

In some other embodiments, the minor structures and the side plates mayprotrude from different surfaces.

Further, as shown in FIG. 3 and FIG. 4, a length L1 of the diversionpart 121 of the minor structure 120 along a direction F2 parallel to thelongitudinal edge L of the main plate 111 is less than a length L2 ofthe through hole P, and an orthogonal projection of the diversion part121 onto the main plate 111 is located between the two adjacent firstedges 1111. As shown in FIG. 3, in the direction F2, the second edge1211 of the diversion part 121 and the first edge 1111 of the main plate111 are spaced apart by a distance M1. Furthermore, as shown in FIG. 4and FIG. 5, which FIG. 5 is a partially enlarged cross-sectional topview of the heat dissipation device in FIG. 4, the main plate 111 andthe diversion part 121 are spaced apart by a distance M2 along a normaldirection N of the first surface 111 a, and define a maximum distance M3between the second edge 1211 of the minor structure 120 and the adjacentfirst edge 1111 of the main plate 111; the maximum distance M3 is largerthan the distance M2 and is less than the sum of the distance M1 and thedistance M2. And the maximum distance M3 is large enough to preventparticles from blocking the channel S, thereby securing a smooth flow ofthe fluid. For example, the particles may have a diameter of 0.5 to 0.6mm, and the maximum distance M3 may be designed slightly larger than0.60 mm. As a result, the particles can flow through the maximumdistance M3 and the channel S may not be blocked. Therefore, it is noneed to use the fewer fin structures 100 than convention, thus keepingthe total surface area of the fin structures 100 in the channel S. Notethat actual value of the maximum distance M3 is not limited and can bealtered in accordance with the size of particles.

In short, in this embodiment, adjusting the length L1 of the diversionpart 121 is able to obtain a desired distance to both the main plate 111and the adjacent main plate 111, thereby effectively preventingparticles from blocking the channel S. As a result, there is no need tochange or decrease the spacing between the main plates 111 since thelarger distance between the adjacent main plates 111 would lower thedensity of the main plates 111 in a specific size of the heatdissipation device 10 and thus decreasing the heat exchange efficiency.

Note that the disclosure is not limited by the appearance of the finstructure 100. In fact, the appearance of the fin structure may bemodified in accordance with the location and/or type of the heat source.Please refer to FIG. 6, which is a front view of a fin structureaccording to a second embodiment of the present disclosure. In thisembodiment, a main body 210 of a fin structure 200 may further include amain plate 211 and two side plates 212. The side plates 212 arerespectively connected to two opposite sides of the main plate 211.

Each minor structure 220 is made by, for example, a stamping process andmay further include a diversion part 221. The diversion part 221 has arectangular shape. Two opposite sides of the diversion part 221 arerespectively connected to the main plate 211. In this embodiment, thediversion part 221 of the minor structure 220 is spaced apart from theside plates 212 by different distances. Specifically, each the diversionpart 221 is spaced apart from one of the side plates 212 by a distanced3 and is spaced apart from another one of the two side plates 212 by adistance d4, and the distance d4 is different from the distance d3.

Please refer to FIG. 7, which is a front view of a fin structureaccording to a third embodiment of the present disclosure.

In this embodiment, a main body 310 of a fin structure 300 may furtherinclude a main plate 311 and two side plates 312. The side plates 312are respectively connected to two opposite sides of the main plate 311.Each minor structure 320 is made by, for example, a stamping process andmay further include a diversion part 321. The diversion part 321 has arectangular shape. Two opposite sides of the diversion part 321 arerespectively connected to the main plate 311. In this embodiment, theintervals between the diversion parts 321 of the minor structures 320increase along a flow direction F which is defined as a direction fromthe inflow side to the outflow side. In detail, the intervals betweenthe diversion parts 321, along the flow direction F, are sequentiallyG1, G2 and G3. The interval G1 is smaller than the interval G2, and theinterval G2 is smaller than the interval G3, but the disclosure is notlimited thereto. In some other embodiments, the intervals of thediversion parts may decrease along the flow direction.

Please refer to FIG. 8, which is a front view of a fin structureaccording to a fourth embodiment of the present disclosure.

In this embodiment, a main body 410 of a fin structure 400 may furtherinclude a main plate 411 and two side plates 412. The side plates 412are respectively connected to two opposite sides of the main plate 411.Each minor structure 420 is made by, for example, a stamping process andmay further include a diversion part 421. The diversion part 421 has aparallelogram shape. Two opposite sides of the diversion part 421 arerespectively connected to the main plate 411.

Please refer to FIG. 9, which is a front view of a fin structureaccording to a fifth embodiment of the present disclosure.

In this embodiment, a main body 510 of a fin structure 500 may furtherinclude a main plate 511 and two side plates 512. The side plates 512are respectively connected to two opposite sides of the main plate 511.Each minor structure 520 is made by, for example, a stamping process andmay further include a diversion part 521. The diversion part 521 has arectangular shape. Two opposite sides of the diversion part 521 arerespectively connected to the main plate 511. In this embodiment, theminor structures 520, in a flow direction, are different in side length.In detail, the distances of the diversion parts 521 of the minorstructures 520 are sequentially W1, W2, W3 and W4, wherein the distanceW1 is smaller than distance W2, distance W2 is smaller than distance W3,and distance W3 is smaller than W4.

Please refer to FIG. 10, which is a partially cross-sectional top viewof a fin structure according to a sixth embodiment of the presentdisclosure. In this embodiment, a main body 610 of a fin structure 600may further include a main plate 611, and the main plate 611 may furtherinclude a first surface 611 a. Each minor structure 620 protrudes fromthe first surface 611 a of the main plate 611 and may further include adiversion part 621. The diversion parts 621 of the minor structures 620protrude from the first surface 611 a of the main plate 611 by differentdistances d5 and d6.

Please refer to FIG. 11, which is a front view of a fin structureaccording to a seventh embodiment of the present disclosure. In thisembodiment, a main body 710 of a fin structure 700 may further include amain plate 711 and two side plates 712. The side plates 712 arerespectively connected to two opposite sides of the main plate 711. Eachminor structure 720 is made by, for example, a stamping process and mayfurther include a diversion part 721 and two connecting parts 722. Thediversion part 721 has a rectangular shape. Two opposite sides of thediversion part 721 are respectively connected to the main plate 711. Inthis embodiment, the diversion parts 721 of two of the minor structures720 are respectively spaced apart from one of the two side plates 712 bydifferent distances d7 and d8. In detail, the diversion part 721 of oneof the minor structures 720 is spaced apart from one of the two sideplates 712 by a distance d7, and the diversion part 721 of another oneof the minor structures 720 is spaced apart from the one of the two sideplates 712 by a distance d8 which is different from distance d7.

As indicated by the arrows, while the fluid flows along the channel S,the fluid will be repeatedly divided into two by the connecting part 722and thus becoming a turbulent flow. In contrast, the fluid may alsobecome turbulent by the diversion part 721 and the main part 711 as theaforementioned embodiment.

Please refer to FIG. 12 to FIG. 15, FIG. 12 is a partially enlargedperspective view of a heat dissipation device according to an eighthembodiment of the present disclosure, FIG. 13 is a partially enlargedfront view of the heat dissipation device in FIG. 12, FIG. 14 is apartially enlarged side view of the heat dissipation device in FIG. 12,and FIG. 15 is a partially enlarged cross-sectional top view of the heatdissipation device in FIG. 12.

As shown in FIG. 12, in this embodiment, the heat dissipation device 80includes a main body 810 and a plurality of minor structures 820. Themain body 810 includes a plurality of main plates 811 and two sideplates 812. The side plates 812 are respectively connected to twoopposite sides of each of the main plates 811. Each of the minorstructures 820 is disposed on one of the side plates 812 and is locatedat a side of one of the main plates 811.

As shown in FIG. 13 to FIG. 15, the main plate 811 each have a pluralityof through holes P and a plurality of first edges 8111. The first edges8111 are located at two opposite sides of the through holes P, and thefirst edge 8111 is substantially orthogonal to the longitudinal edge Lof the main plate 811. The minor structure 820 has two second edges 821respectively located at two opposite sides of the minor structure 820and are not directly connected to the main plate 811. And the secondedge 821 is also substantially orthogonal to the longitudinal edge L.

In this embodiment, the minor structure 820 are not parallel to the mainplate 811. Specifically, the minor structure 820 is at angle A to themain plate 811. Moreover, a length L1 of the minor structure 820 along adirection F2 parallel to the longitudinal edge L of the main plate 811is less than a length L2 of the through hole P, and an orthogonalprojection of the minor structure 820 onto the main plate 811 is locatedbetween the two adjacent first edges 8111. As shown in FIG. 13, in thedirection F2, the second edge 821 of the minor structure 820 and thefirst edge 8111 of the main plate 811 are spaced apart by a distance M1.

In this embodiment, the minor structure 820 is not parallel to the mainplate 811. Specifically, the minor structure 820 is at an acute anglewith respect to the main plate 811.

In this embodiment, as shown in FIG. 15, the main plate 811 and theminor structure 820 are spaced apart by a distance M2 along a normaldirection N of a first surface 811 a of the main plate 811, and define amaximum distance M3 between the second edge 821 of the minor structure820 and the adjacent first edge 8111 of the main plate 811; the maximumdistance M3 is larger than the distance M2 and is less than the sum ofthe distance M1 and the distance M2. And the maximum distance M3 islarge enough to prevent particles from blocking the channel S, therebysecuring a smooth flow of the fluid. For example, the particles may havea diameter of 0.5 to 0.6 mm, and the maximum distance M3 may be designedslightly larger than 0.60 mm. As a result, the particles can flowthrough the maximum distance M3 and the channel S may not be blocked.Therefore, it is no need to use the fewer main plates 811 thanconvention, thus keeping the total surface area of the main plates 811in the channel S. Note that the actual value of the maximum distance M3is not limited and can be altered in accordance with the size of theparticles.

In short, in this embodiment, adjusting the length L1 of the minorstructure 820 is able to obtain a desired distance to both the mainplate 811 and the adjacent main plate 811, thereby effectivelypreventing particles from blocking the channel S. As a result, there isno need to change or decrease the spacing between the main plates 811since the larger distance between the adjacent main plates 811 wouldlower the density of the main plates 811 in a specific size of the heatdissipation device 80 and thus decreasing the heat exchange efficiency.

Furthermore, in this embodiment, the heat dissipation device 80 is madeof a single-piece, but the present disclosure is not limited thereto. Insome other embodiments, the heat dissipation device may be assembled bya plurality of pieces.

Please refer to FIG. 16 to FIG. 19, FIG. 16 is a partially perspectiveview of a heat dissipation device according to a ninth embodiment of thepresent disclosure, FIG. 17 is a partially side view of the heatdissipation device in FIG. 16, FIG. 18 is a partially front view of theheat dissipation device in FIG. 16, and FIG. 19 is a partiallycross-sectional top view of the heat dissipation device in FIG. 16.

As shown in FIG. 16 and FIG. 17, in this embodiment, the heatdissipation device 90 includes a plurality of first heat dissipationstructures 910 and a plurality of second heat dissipation structures920. The first heat dissipation structures 910 each include a pluralityof first heat sinks 911, a plurality of first connection heat sinks 912and a plurality of second connection heat sinks 913. The first heatsinks 911 are spaced apart from one another, they are connected throughthe first connection heat sinks 912 and second connection heat sinks913. Specifically, as shown in the figure, to each first heat sink 911,the first connection heat sink 912 is connected to one side of the firstheat sink 911, the second connection heat sink 913 is connected to theopposite side of the first heat sink 911, and the first connection heatsink 912 and the second connection heat sink 913 extend in oppositedirections from the first heat sink 911 so as to connect the adjacentfirst heat sinks 911.

The second heat dissipation structures 920 each include a plurality ofsecond heat sinks 921, a plurality of third connection heat sinks 922and a plurality of fourth connection heat sinks 923. The second heatsinks 921 are spaced apart from one another, they are connected throughthe third connection heat sinks 922 and fourth connection heat sinks923. Specifically, as shown in the figure, to each second heat sink 921,the third connection heat sink 922 is connected to one side of thesecond heat sink 921, the fourth connection heat sink 923 is connectedto the opposite side of the second heat sink 921, and the thirdconnection heat sinks 922 and the fourth connection heat sink 923 extendin opposite directions from the second heat sink 921 so as to connectthe adjacent second heat sinks 921.

As shown in FIG. 18 and FIG. 19, the first heat dissipation structures910 and the second heat dissipation structures 920 are alternativelydisposed along a first direction D1, and the first heat sinks 911 arenot respectively aligned with the second heat sinks 921 and are spacedfrom the second heat sinks 921 by a distance M1 in the first directionD1 so as to form an opening O therebetween. In addition, the first heatsinks 911 and the second heat sinks 921 are spaced apart by a distanceM2 in a second direction D2 that is substantially orthogonal to thefirst direction D1. The opening O has a maximum distance M3, and themaximum distance M3 is larger than the distance M2 and is less than thesum of the distance M1 and the distance M2. And the maximum distance M3is large enough to prevent particles from blocking the channel S,thereby securing a smooth flow of the fluid. For example, the particlesmay have a diameter of 0.5 to 0.6 mm, and the maximum distance M3 may bedesigned slightly larger than 0.60 mm. As a result, the particles canflow through the maximum distance M3 and the channel S may not beblocked. Therefore, it is no need to use the fewer first heat sinks 911than convention, thus keeping the total surface area of the first heatsinks 911 in the channel S. Note that the actual value of the maximumdistance M3 is not limited and can be altered in accordance with thesize of the particles.

In this embodiment, the first connection heat sinks 912 are directlyconnected to the third connection heat sinks 922, and the secondconnection heat sinks 913 are directly connected to the fourthconnection heat sinks 923, but the disclosure is not limited thereto.Please refer to FIG. 20 to FIG. 23, FIG. 20 is a partially enlargedperspective view of a heat dissipation device according to a tenthembodiment of the present disclosure, FIG. 21 is a partially enlargedside view of the heat dissipation device in FIG. 20, FIG. 22 is apartially enlarged front view of the heat dissipation device in FIG. 20,and FIG. 23 is a partially enlarged cross-sectional top view of the heatdissipation device in FIG. 20.

As shown in FIG. 20 and FIG. 21, in this embodiment, the heatdissipation device 1000 includes a plurality of first heat dissipationstructures 1010 and a plurality of second heat dissipation structures1020. The first heat dissipation structures 1010 each include aplurality of first heat sinks 1011, a plurality of first connection heatsinks 1012 and a plurality of second connection heat sinks 1013. Thefirst heat sinks 1011 are spaced apart from one another, they areconnected through the first connection heat sinks 1012 and secondconnection heat sinks 1013. Specifically, as shown in the figure, toeach first heat sink 1011, the first connection heat sink 1012 isconnected to one side of the first heat sink 1011, the second connectionheat sink 1013 is connected to the opposite side of the first heat sink1011, and the first connection heat sink 1012 and the second connectionheat sink 1013 extend in opposite directions from the first heat sink1011 so as to connect the adjacent first heat sinks 1011.

The second heat dissipation structures 1020 each include a plurality ofsecond heat sinks 1021, a plurality of third connection heat sinks 1022and a plurality of fourth connection heat sinks 1023. The second heatsinks 1021 are spaced apart from one another, they are connected throughthe third connection heat sinks 1022 and fourth connection heat sinks1023. Specifically, as shown in the figure, to each second heat sink1021, the third connection heat sink 1022 is connected to one side ofthe second heat sink 1021, the fourth connection heat sink 1023 isconnected to the opposite side of the second heat sink 1021, and thethird connection heat sinks 1022 and the fourth connection heat sink1023 extend in opposite directions from the second heat sink 1021 so asto connect the adjacent second heat sinks 1021.

As shown in FIG. 22 and FIG. 23, the first heat dissipation structures1010 and the second heat dissipation structures 1020 are alternativelydisposed along a first direction D1, and the first heat sinks 1011 arenot respectively aligned with the second heat sinks 1021 and are spacedfrom the second heat sinks 1021 by a distance M1 in the first directionD1 so as to form an opening O therebetween. In addition, the first heatsinks 1011 and the second heat sinks 1021 are spaced apart by a distanceM2 in a second direction D2 that is substantially orthogonal to thefirst direction D1. The opening O has a maximum distance M3, and themaximum distance M3 is larger than the distance M2 and is less than thesum of the distance M1 and the distance M2. And the maximum distance M3is large enough to prevent particles from blocking the channel S,thereby securing a smooth flow of the fluid. For example, the particlesmay have a diameter of 0.5 to 0.6 mm, and the maximum distance M3 may bedesigned slightly larger than 0.60 mm. As a result, the particles canflow through the maximum distance M3 and the channel S may not beblocked. Therefore, it is no need to use the fewer first heat sinks 1011than convention, thus keeping the total surface area of the first heatsinks 1011 in the channel S. Note that the actual value of the maximumdistance M3 is not limited and can be altered in accordance with thesize of the particles.

In this embodiment, the first connection heat sinks 1012 are directlyconnected to the third connection heat sinks 1022, but the secondconnection heat sinks 1013 are indirectly connected to the fourthconnection heat sinks 1023.

According to the heat dissipation device and the fin structure discussedabove, the minor structure protrudes from the main body and does notoverlap with another main body. This configuration can cause the fluidto become a turbulent flow so as to increase the heat exchangeefficiency.

Furthermore, in some embodiments, the diversion parts may be spacedapart from the side plates by different distances, which helps the fluidto form a turbulent flow in the gaps between the diversion parts and theside plates.

Also, the openings do not extend to the side plates. Therefore, the finstructure has a decent structural strength while having theconfiguration to achieve the above turbulent flow.

Moreover, the minor structures of the fin structures do not interferewith the adjacent main bodies, such that it would be easy and convenientto connect the fin structures and possible to modify the shape of theminor structure. The fin structures may be assembled by, for example,welding.

The embodiments are chosen and described in order to best explain theprinciples of the present disclosure and its practical applications, tothereby enable others skilled in the art best utilize the presentdisclosure and various embodiments with various modifications as aresuited to the particular use being contemplated. It is intended that thescope of the present disclosure is defined by the following claims andtheir equivalents.

What is claimed is:
 1. A fin structure, comprising: a main body,comprising a main plate and two side plates; wherein the main plate hasat least one through hole, and the two side plates are respectivelyconnected to two opposite sides of the main plate and protrude from themain plate; and at least one minor structure, protruding from the mainplate and being located at a side of the main plate; wherein the atleast one minor structure is spaced apart from the two side plates, theat least one minor structure partially covers the at least one throughhole, and the at least one minor structure has a length, in alongitudinal direction of the main plate, less than a length of the atleast one through hole of the main plate so that two opposite edges ofthe at least one minor structure respectively form two openings,arranged along the longitudinal direction of the main plate, with themain plate, and two opposites sides of the at least one minor structurefacing towards the side plates of the main body are absent of opening,wherein the two opposites sides extend longitudinally; wherein the atleast one minor structure includes a diversion part and two connectingparts, the diversion part is a plate spaced apart from the main part bythe connecting parts and is shorter than the through hole of the mainplate, and the each of the connecting parts and the diversion part arethe same in length and each of the connecting parts is absent ofopening.
 2. The fin structure according to claim 1, wherein the mainplate has two first edges respectively located at two opposite sides ofthe through hole, the first edges are not parallel to a longitudinaledge of the main plate, an orthogonal projection of the at least oneminor structure onto the main plate is located between the first edges,and the two opposite sides of the through hole along a longitudinaldirection of the main plate are not covered by the at least one minorstructure so that the at least one minor structure partially covers theat least one through hole.
 3. The fin structure according to claim 2,wherein the two side plates protrude from a first surface of the mainplate, the at least one minor structure has two second edges, the secondedges are not parallel to the longitudinal edge of the main plate, and amaximum distance between one of the second edges and one of the firstedges of the main plate adjacent thereto is larger than a distance, in anormal direction of the first surface, between the at least one minorstructure and the main plate.
 4. The fin structure according to claim 3,wherein the maximum distance between the one of the second edges and theone of the first edges of the main plate adjacent thereto is less than asum of the distance, in the normal direction of the first surface,between the at least one minor structure and the main plate and adistance, in the longitudinal direction of the main plate, between theat least one minor structure and the main plate.
 5. The fin structureaccording to claim 1, wherein the at least one minor structure is spacedapart from the two side plates by a same distance.
 6. The fin structureaccording to claim 1, wherein the at least one minor structure is spacedapart from the two side plates by different distances.
 7. The finstructure according to claim 1, wherein a quantity of the at least oneminor structure is two, and the two minor structures are respectivelyspaced apart from one of the two side plates by different distances. 8.The fin structure according to claim 1, wherein the main plate has afirst surface and a second surface opposite to each other, and the atleast one minor structure and the two side plates protrude from thefirst surface.
 9. The fin structure according to claim 8, wherein aquantity of the at least one minor structure is plural, and the minorstructures respectively protrude from the first surface by a samedistance.
 10. The fin structure according to claim 8, wherein a quantityof the at least one minor structure is plural, and at least two of theminor structures respectively protrude from the first surface bydifferent distances.
 11. The fin structure according to claim 1, whereinthe main plate has a first surface and a second surface opposite to eachother, the at least one minor structure protrudes from the firstsurface, and the two side plates protrude from the second surface. 12.The fin structure according to claim 1, wherein a quantity of the atleast one minor structure is plural, and the minor structures have atleast two intervals different in value.
 13. The fin structure accordingto claim 12, wherein the at least two intervals increase along a flowdirection.
 14. The fin structure according to claim 12, wherein the atleast two intervals decrease along a flow direction.
 15. The finstructure according to claim 1, wherein a quantity of the at least oneminor structure is plural, and the minor structures, in a flowdirection, are different in side length.
 16. The fin structure accordingto claim 1, wherein the at least one minor structure is not parallel tothe main plate.
 17. The fin structure according to claim 1, wherein theat least one minor structure is at an acute angle with respect to themain plate.
 18. A heat dissipation device, comprising: a plurality offin structures, each comprising a main body and at least one minorstructure; wherein two of the plurality of the fin structures areconnected so as to form a channel, the at least one minor structureconnected to the main body is located in the channel, and the at leastone minor structure of one of the plurality of fin structures is spacedapart from the main body of another one of the plurality of finstructures; and wherein the main body has at least one through hole, theat least one minor structure partially covers the at least one throughhole, and the at least one minor structure has a length, in alongitudinal direction of the main body, less than a length of the atleast one through hole of the main body so that two opposite edges ofthe at least one minor structure respectively form two openings,arranged along the longitudinal direction of a main plate, with the mainplate, and two opposites sides of the at least one minor structurefacing towards the side plates of the main body are absent of opening,wherein the two opposites sides extend longitudinally; wherein the atleast one minor structure includes a diversion part and two connectingparts, the diversion part is a plate spaced apart from the main part bythe connecting parts and is shorter than the through hole of the mainplate, and the each of the connecting parts and the diversion part arethe same in length and each of the connecting parts is absent ofopening.
 19. The fin structure according to claim 18, wherein the mainbody has two first edges respectively located at two opposite sides ofthe through hole, the first edges are not parallel to a longitudinaledge of the main body, an orthogonal projection of the at least oneminor structure onto the main body is located between the first edges,and the two opposite sides of the through hole along a longitudinaldirection of the main plate are not covered by the at least one minorstructure so that the at least one minor structure partially covers theat least one through hole.
 20. The fin structure according to claim 19,wherein the at least one minor structure protrudes from a first surfaceof the main body, the at least one minor structure has two second edges,the second edges are not parallel to the longitudinal edge of the mainbody, and a maximum distance between one of the second edges and one ofthe first edges of the main body adjacent thereto is larger than adistance, in a normal direction of the first surface, between the atleast one minor structure and the main body.
 21. The fin structureaccording to claim 20, wherein the maximum distance between the one ofthe second edges and the one of the first edges of the main bodyadjacent thereto is less than a sum of the distance, in the normaldirection of the first surface, between the at least one minor structureand the main body and a distance, in the longitudinal direction of themain body, between the at least one minor structure and the main body.22. The heat dissipation device according to claim 18, wherein the mainbody comprises a main plate and two side plates, the two side plates arerespectively connected to two opposite sides of the main plate, and theat least one minor structure protrudes from the main plate of the mainbody.
 23. The heat dissipation device according to claim 22, wherein theat least one minor structure is spaced apart from the two side plates bya same distance.
 24. The heat dissipation device according to claim 22,wherein the at least one minor structure is spaced apart from the twoside plates by different distances.
 25. The heat dissipation deviceaccording to claim 22, wherein a quantity of the at least one minorstructure is two, and the two minor structures are respectively spacedapart from one of the two side plates by different distances.
 26. Theheat dissipation device according to claim 22, wherein the main platehas a first surface and a second surface opposite to each other, and theat least one minor structure and the two side plates protrude from thefirst surface.
 27. The heat dissipation device according to claim 26,wherein a quantity of the at least one minor structure is plural, andthe minor structures respectively protrude from the first surface by asame distance.
 28. The heat dissipation device according to claim 26,wherein a quantity of the at least one minor structure is plural, and atleast two of the minor structures respectively protrude from the firstsurface by different distances.
 29. The heat dissipation deviceaccording to claim 22, wherein the main plate has a first surface and asecond surface opposite to each other, the at least one minor structureprotrudes from the first surface, and the two side plates protrudes fromthe second surface.
 30. The heat dissipation device according to claim18, wherein a quantity of the at least one minor structure is plural,and the minor structures have at least two intervals different in value.31. The heat dissipation device according to claim 30, wherein the atleast two intervals increase along a flow direction.
 32. The heatdissipation device according to claim 30, wherein the at least twointervals decrease along a flow direction.
 33. The heat dissipationdevice according to claim 20, wherein a quantity of the at least oneminor structure is plural, and the minor structures, in a flowdirection, are different in side length.
 34. A fin structure,comprising: a main body, comprising a main plate and two side plates;wherein the main plate has at least one through hole, and the two sideplates are respectively connected to two opposite sides of the mainplate and protrude from the main plate; and at least one minorstructure, protruding from the main plate and being located at a side ofthe main plate; wherein the at least one minor structure partiallycovers the at least one through hole, and the at least one minorstructure has a length, in a longitudinal direction of the main plate,less than a length of the at least one through hole of the main plate sothat two opposite edges of the at least one minor structure respectivelyform two openings, arranged along the longitudinal direction of the mainplate, with the main plate, and two opposites sides of the at least oneminor structure facing towards the side plates of the main body areabsent of opening, wherein the two opposites sides extendlongitudinally; wherein the at least one minor structure includes adiversion part and two connecting parts, the diversion part is a platespaced apart from the main part by the connecting parts and is shorterthan the through hole of the main plate, and the each of the connectingparts and the diversion part are the same in length and each of theconnecting parts is absent of opening.
 35. The fin structure accordingto claim 34, wherein the main plate has two first edges respectivelylocated at two opposite sides of the through hole, the first edges arenot parallel to a longitudinal edge of the main plate, an orthogonalprojection of the at least one minor structure onto the main plate islocated between the first edges, and the two opposite sides of thethrough hole along a longitudinal direction of the main plate are notcovered by the at least one minor structure so that the at least oneminor structure partially covers the at least one through hole.
 36. Thefin structure according to claim 35, wherein the two side platesprotrude from a first surface of the main plate, the at least one minorstructure has two second edges, the second edges are not parallel to thelongitudinal edge of the main plate, and a maximum distance between oneof the second edges and one of the first edges of the main plateadjacent thereto is larger than a distance, in a normal direction of thefirst surface, between the at least one minor structure and the mainplate.
 37. The fin structure according to claim 36, wherein the maximumdistance between the one of the second edges and the one of the firstedges of the main plate adjacent thereto is less than a sum of thedistance, in the normal direction of the first surface, between the atleast one minor structure and the main plate and a distance, in thelongitudinal direction of the main plate, between the at least one minorstructure and the main plate.
 38. A heat dissipation device, comprising:a plurality of fin structures, each comprising a main body and at leastone minor structure connected to the main body; wherein two of theplurality of the fin structures adjacent to each other are connected soas to form at least one channel, and the at least one minor structure islocated in the at least one channel; and wherein the main body has atleast one through hole partially covered by the at least one minorstructure, and the at least one minor structure has a length, in alongitudinal direction of the main body, less than a length of the atleast one through hole of the main body so that two opposite edges ofthe at least one minor structure respectively form two openings,arranged along the longitudinal direction of a main plate, with the mainplate, wherein two opposites sides of the at least one minor structurethat extend longitudinally are absent of opening; wherein the at leastone minor structure includes a diversion part and two connecting parts,the diversion part is a plate spaced apart from the main part by theconnecting parts and is shorter than the through hole of the main plate,and the each of the connecting parts and the diversion part are the samein length and each of the connecting parts is absent of opening.
 39. Thefin structure according to claim 38, wherein the main body has two firstedges respectively located at two opposite sides of the through hole,the first edges are not parallel to a longitudinal edge of the mainbody, an orthogonal projection of the at least one minor structure ontothe main body is located between the first edges, and the two oppositesides of the through hole along a longitudinal direction of the mainplate are not covered by the at least one minor structure so that the atleast one minor structure partially covers the at least one throughhole.
 40. The fin structure according to claim 39, wherein the at leastone minor structure protrudes from a first surface of the main body, theat least one minor structure has two second edges, and the second edgesare not parallel to the longitudinal edge of the main body, and amaximum distance between one of the second edges and one of the firstedges of the main body adjacent thereto is larger than a distance, in anormal direction of the first surface, between the at least one minorstructure and the main body.